Function defineView

backend/plugin/parser/tidb/completion.go:285–299

defineView installs a view in the catalog. Unlike tables, the only structured input is the view's definition SQL, whose exact shape varies (full "CREATE VIEW ..." vs. a bare SELECT). We try the definition as-is, then wrapped in CREATE VIEW, and finally fall back to a trivial view so the view name st

(cat *catalog.Catalog, name, definition string)

// name still surfaces as a candidate (matching mysql, which reads view names
// straight from metadata) even when the definition cannot be parsed.
func defineView(cat *catalog.Catalog, name, definition string) {
	var attempts []string
	if definition != "" {
		attempts = append(attempts,
			definition,
			fmt.Sprintf("CREATE VIEW %s AS %s", backtickIdentifier(name), definition),
		)
	}
	attempts = append(attempts, fmt.Sprintf("CREATE VIEW %s AS SELECT 1", backtickIdentifier(name)))
	for _, ddl := range attempts {
		if execOK(cat, ddl) {
			return
		}
	}
}

// execOK runs DDL against the catalog and reports whether it actually installed
// a schema object: every statement parsed without error AND at least one was a